Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)
文献类型：期刊论文
| 作者 | Wei, Q. W.1,2,3; Kynard, B.4; Yang, D. G.1,2,3; Chen, X. H.1,3; Du, H.1,3; Shen, L.1,3; Zhang, H.1 |
| 刊名 | JOURNAL OF APPLIED ICHTHYOLOGY
 |
| 出版日期 | 2009-10-01 |
| 卷号 | 25页码:100-106 |
| 关键词 | WHITE STURGEON SHORTNOSE STURGEON LAKE STURGEON GEZHOUBA DAM HISTORY MASSACHUSETTS CONSERVATION MOVEMENT FLOW |
| ISSN号 | 0175-8659 |
| 通讯作者 | Wei, QW, Chinese Acad Fisheries Sci, Key Lab Freshwater Biodivers Conservat & Utilizat, Minist Agr China, Yangtze River Fisheries Res Inst, 41 Jianghan Rd, Jingzhou City 434000, Hubei Province, Peoples R China |
| 中文摘要 | P>A sampling system for capturing sturgeon eggs using a D-shaped bottom anchored drift net was used to capture early life stages (ELS) of Chinese sturgeon, Acipenser sinensis, and monitor annual spawning success at Yichang on the Yangtze River, 1996-2004, before and just after the Three Gorges Dam began operation. Captured were 96 875 ELS (early life stages: eggs, yolk-sac larvae = eleuthero embryos, and larvae); most were eggs and only 2477 were yolk-sac larvae. Most ELS were captured in the main river channel and inside the bend at the Yichang spawning reach. Yolk-sac larvae were captured for a maximum of 3 days after hatching began, indicating quick dispersal downstream. The back-calculated day of egg fertilization over the eight years indicated a maximum spawning window of 23 days (20 October-10 November). Spawning in all years was restricted temporally, occurred mostly at night and during one or two spawning periods, each lasting several days. The brief temporal spawning window may reduce egg predation by opportunistic predators by flooding the river bottom with millions of eggs. During 1996-2002, the percentage of fertilized eggs in an annual 20-egg sample was between 63.5 to 94.1%; however, in 2003 the percentage fertilized was only 23.8%. This sudden decline may be related to the altered environmental conditions at Yichang caused by operation of the Three Gorges Dam. Further studies are needed to monitor spawning and changes in egg fertilization in this threatened population. |
| 英文摘要 | P>A sampling system for capturing sturgeon eggs using a D-shaped bottom anchored drift net was used to capture early life stages (ELS) of Chinese sturgeon, Acipenser sinensis, and monitor annual spawning success at Yichang on the Yangtze River, 1996-2004, before and just after the Three Gorges Dam began operation. Captured were 96 875 ELS (early life stages: eggs, yolk-sac larvae = eleuthero embryos, and larvae); most were eggs and only 2477 were yolk-sac larvae. Most ELS were captured in the main river channel and inside the bend at the Yichang spawning reach. Yolk-sac larvae were captured for a maximum of 3 days after hatching began, indicating quick dispersal downstream. The back-calculated day of egg fertilization over the eight years indicated a maximum spawning window of 23 days (20 October-10 November). Spawning in all years was restricted temporally, occurred mostly at night and during one or two spawning periods, each lasting several days. The brief temporal spawning window may reduce egg predation by opportunistic predators by flooding the river bottom with millions of eggs. During 1996-2002, the percentage of fertilized eggs in an annual 20-egg sample was between 63.5 to 94.1%; however, in 2003 the percentage fertilized was only 23.8%. This sudden decline may be related to the altered environmental conditions at Yichang caused by operation of the Three Gorges Dam. Further studies are needed to monitor spawning and changes in egg fertilization in this threatened population. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Fisheries; Marine & Freshwater Biology |
| 类目[WOS] | Fisheries ; Marine & Freshwater Biology |
| 研究领域[WOS] | Fisheries ; Marine & Freshwater Biology |
| 关键词[WOS] | WHITE STURGEON ; SHORTNOSE STURGEON ; LAKE STURGEON ; GEZHOUBA DAM ; HISTORY ; MASSACHUSETTS ; CONSERVATION ; MOVEMENT ; FLOW |
| 收录类别 | SCI |
| 资助信息 | Bureau of Fisheries (Ministry of Agriculture) ; Bureau of Fisheries (Hubei Province) ; Chinese sturgeon Nature Reserve, Yichang City (Hubei Province) ; National Natural Science Foundation of China [30490231, 39570564]; Three Gorges Project Office, State Department [1-03-02-01-03]; Ministry of Science and Technology [2000DIB50177, 2002DEA10004] |
| 语种 | 英语 |
| WOS记录号 | WOS:000269496100017 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/7600]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | 1.Chinese Acad Fisheries Sci, Key Lab Freshwater Biodivers Conservat & Utilizat, Minist Agr China, Yangtze River Fisheries Res Inst, Jingzhou City 434000, Hubei Province, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei Province, Peoples R China 3.Chinese Acad Fisheries Sci, Freshwater Fisheries Res Ctr, Wuxi City, Peoples R China 4.US Geol Survey, Leetown Sci Ctr, SO Conte Anadromous Fish Res Ctr, Turners Falls, MA USA |
| 推荐引用方式 GB/T 7714 | Wei, Q. W.,Kynard, B.,Yang, D. G.,et al. Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)[J]. JOURNAL OF APPLIED ICHTHYOLOGY,2009,25:100-106. |
| APA | Wei, Q. W..,Kynard, B..,Yang, D. G..,Chen, X. H..,Du, H..,...&Zhang, H..(2009).Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis).JOURNAL OF APPLIED ICHTHYOLOGY,25,100-106. |
| MLA | Wei, Q. W.,et al."Using drift nets to capture early life stages and monitor spawning of the Yangtze River Chinese sturgeon (Acipenser sinensis)".JOURNAL OF APPLIED ICHTHYOLOGY 25(2009):100-106. |
入库方式： OAI收割
来源：水生生物研究所
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